Question

the crossover from the elastic phase of tightening to the plastic phase of tightening is called the _______________. stretch point yield point clamp load proof load

Explanation:

The yield point is the transition from elastic - where a material returns to its original shape after stress is removed - to plastic - where it deforms permanently. Stretch point is not a standard term for this transition. Clamp load and proof load are related to forces on fasteners and not the transition between elastic and plastic phases.

Answer:

B. yield point